| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Union Texas Petroleum Corp. | Houston, TX 77252-2120 | Oil & Gas Operator | Dec 2014 |
| 2 | United Gas Pipe Line Co. | Oil Operator | Aug 1993 | |
| 3 | University Field Management LLC | Oil Operator | Nov 2023 |